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Finding the Fourth Proportional to 28,875.38, 39,848.02 and 15,627.38

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Solution

The fourth proportional to 28,875.38, 39,848.02 and 15,627.38 is: 21,565.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,875.38 : 39,848.02 = 15,627.38 : x
  2. Step 2: Convert to fraction form
    28,875.38/39,848.02 = 15,627.38/x
  3. Step 3: Cross multiply
    28,875.38x = 39,848.02 × 15,627.38
  4. Step 4: Simplify right side
    28,875.38x = 622,720,150.79
  5. Step 5: Solve for x
    x = 622,720,150.79/28,875.38
  6. Step 6: Final answer
    x = 21,565.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.